Y-Wing variants
• BTL Y-wing starfighter
The BTL Y-wing starfighter, built by Koensayr Manufacturing, was a mainstay of the Alliance Starfighter Corps. It was often used as an assault bomber to attack enemy capital ships directly in conjunction with the later B-wing starfighters.
Armament
Taim & Bak IX4 or KX5 laser cannons[4] (2)
Light ArMek turreted SW-4 ion cannons (2)
Arakyd Flex Tube proton torpedo launchers (2)
4 torpedoes each
Proton bombs
• BTL-S3 Y-wing starfighter
The BTL-S3 Y-wing, a variant configuration of the BTL Y-wing starfighter, was the most common Y-wing configuration. A two-man strike starfighter, the first crew member piloted the craft, while the second acted as a gunner and controlled the two swivel-mounted ion cannons, located right on top of the cockpit.
Armament
Taim & Bak IX4 or KX5 laser cannons (2)
ArMek turreted SW-4 ion cannon (1)
Aratech Flex Tube proton torpedo launchers (2)
10 torpedoes
20 proton bombs
• BTL-A4 Y-wing starfighter
The BTL-A4 Y-wing starfighter was the one-man version of the BTL-S3 starfighter model.
Armament
Taim & Bak IX4 or KX5 laser cannons (2)
ArMek turreted SW-4 ion cannons (2)
Arakyd Flex Tube proton torpedo launchers (2)
8 torpedoes or 20 proton bombs
• BTL-A4 LP "Longprobe"
An additional (though less common) BTL-A4 variant known as the "LongProbe," designated BTL-A4 (LP), was equipped with a nav computer, backup hyperdrive, advanced scanners, and an extended fuel supply in place of the weapons systems officer.
Armament
Laser cannons
Ion cannons
8 proton torpedoes
• BTL-S3 Courier variant
Alliance Intelligence utilized specially modified Y-wings for long-range courier duty. This variant of the BTL-S3 had no ion cannons, which were removed for baggage space, a larger main cockpit area able to carry up to five people,...
• BTL-S3B Y-wing starfighter
The BTL-S3B Y-wing starfighter was a variant of the S3 Y-wing, with twin blasters.
• Light Y-wing
The Light Y-wing was a light bomber, which lacked the support pylons on the engine.
• Heavy Y-wing
The Heavy Y-wing was a bomber with heavier ordinance and four engine pods.
This interesting list I found is going to keep me researching.
The Y-wing mark I
The Y-wing mark II (Unofficial)
BTL-P1 Y-wing "Prototype"
BTL-F1 Y-wing "Fighter"
BTL-T2 Y-wing "Trainer"
BTL-T2mod Y-wing "Intel Courier"
BTL-T2W Y-wing "Early Warning"
BTL-T2KC Y-wing "Tanker"
BTL-S3 Y-wing "Fighter-Bomber"
BTL-A4 Y-wing "Recon"
BTL-E5 Y-wing "Wild Weasel"
BTL-A6 Y-wing II "Recon"
BTL-S7 Y-wing II "Fighter-Bomber"
BTL-M2 "Medium Bomber"
BTL-U8 Y-wing "Pinnace"
BTL-E9 Y-wing II "Wild Weasel"
BTL-T10 Y-wing II "Trainer"
BTL-D11 Y-wing "Drone"
So with all these variants,
as I read through the differences,
I see a lot of ideas for upgrade cards.
• BTL-A4 title card, maybe like the Charadaan refit (-2) for the A-wing, locking the turret backwards (-2), or removing it completely (-4), adding the Boost ability or evade.
• Longprobe title card that adds the system upgrade.
• BTL-S3 Courier title card that removes the turret, and adds a crew, with restrictions against attack related crew.
• Light Y-wing title card, another Charadaan-like refit that removes both Torpedo slots. perhaps adding boost or evade instead of the negative cost.
• Heavy Y-wing title card that allows for two bomb upgrade slots.
• Veteran title card, the obvious one, that gives the Y-wing an EPT slot.
• Ace title card, not the obvious one, but rather one that gives the Y-wing the Boost or evade ability.
• Astromech upgrade, a droid that will share target locks, like Dutch Vander's ability, but with two other ships like Fleet Officer.
• BTL-T2 Y-wing title card, removes the two proton torpedo slots for two extra shield.
• BTL-T2W title card, extends the range of target locking for self and other ships.
• BTL-A6 Y-wing II "Recon" title card, like the long probe adds the system upgrade, but twice.
• BTL-E5 Y-wing title card, an ability that allows the removal of target locks within a range of 2.
• BTL-U8 "Easy Eight" Y-wing title card, heavily modified with two crew, more hull, less shields, and only the turret as the primary weapon.
• BTL-M2 "Medium Bomber" title card, adds two crew and an extra torpedo slot, making the turret the primary weapon.
• BTL-E9 Y-wing title card, a ship capable of performing a Jam action, same range as the Rebel transport.
• BTL-T10/FO Y-wing title card, if this ship is within range of a huge ship it doubles all target lock actions of the huge ship.
• BTL-TD11 Y-wing drone title card... not even going there, until they introduce Kamikaze ramming rules.
...Yes I know most of the later where unofficial ships created by Urban Lundqvist for use with the Star Wars role-playing game made by West End Games.
https://community.fantasyflightgames.com/topic/111407-rebel-aces-ii/?p=1166547